Help with JK BMS and Victron (sopuli.xyz)

submitted 2 weeks ago* (last edited 2 weeks ago) by [email protected] to c/[email protected]

6 comments fedilink hide all child comments

Hello. I recently bought an off-grid house with its own solar system. So I'm learning little by little. Right now, I have a Voltronic Axpert VMIII inverter connected to two battery banks. These battery banks have 16 batteries each, totaling 32 batteries (LiFePO4). Each bank has a BMS model JK B2A20S20P. There is no communication between this inverter and the BMS; everything works based on voltages, meaning I have told the inverter what voltage it should have. I am going to upgrade my installation with more panels, a Victron MultiPlus-II 48/10000/140-100 inverter, a Victron Cerbo GX MK2, a VICTRON MPPT 250/100-Tr VE.Can, a VICTRON MPPT 250/70-Tr VE.Can, and some other things that I don't think are important right now. My doubts arise about whether it will be possible to connect the BMS of the battery banks to the Victron system so that it can manage the batteries correctly, or if it is better to buy new BMS that do allow this. What do you think?

If I should buy a new BMS, which one do you recommend for this case?

Thank you very much!

Edit: Added type of batteries Edit2: I'm from Spain

you are viewing a single comment's thread
view the rest of the comments

[-] [email protected] 1 points 2 weeks ago

For a future-proof, safer, and smarter setup, upgrading to a CANBus- or RS485-enabled BMS that speaks Modbus or Victron CAN protocol is highly recommended. It makes system integration smoother and battery life longer.

That's mainly why I was asking, because they have released some new BMS from Jk V19 or something like that, which seem to be able to connect through these protocols. The one I'm using has a connection via Can, but I don't really know what functionality they have. I can buy the V19 ones, but i don't want if it is not necessary to because i can save money.

this post was submitted on 05 Jul 2025

4 points (100.0% liked)

SolarDIY

567 readers

2 users here now

SolarDIY is a vibrant community dedicated to embracing the power of solar energy. Here, we encourage you to showcase your ingenious ideas, innovative projects, and inspiring stories, while also seeking valuable advice, fresh ideas, and fostering meaningful connections.

Our passion lies in witnessing the remarkable achievements of individuals who have harnessed the potential of solar energy. Whether you have successfully wired your entire house with solar panels, created a portable solar-powered generator, or crafted an efficient solar pool heater, we are eager to learn from your experiences and celebrate your accomplishments.

Join us on this empowering journey as we explore the endless possibilities of solar energy and inspire one another to make a positive impact on our environment and our lives. Together, we can unlock the full potential of solar power and shape a sustainable future.

Share your DIY solar projects, exchange knowledge, and let your creativity shine!

founded 2 years ago

MODERATORS

[email protected]